Climate and monthly weather forecast
Arendal, Norway

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The climate of Arendal

Arendal, Norway, situated on the southeastern coastline, experiences a Marine West Coast climate or Cfb according to the Köppen Climate Classification. These climatic conditions are largely characterized by mild, moderate weather patterns throughout the year. Within the course of a typical year, temperature fluctuations are relatively minimal, with the warmest month seldom exceeding 19.2°C (66.6°F), while minimum temperatures rarely fall below -1.5°C (29.3°F).

Throughout the year, rainfall registers a steady pattern, with the driest periods occurring from April to June, and the heaviest precipitation periods between October and January. The precipitation levels oscillate between a minimum of 29mm (1.14") to a maximum of 88mm (3.46"). In line with the prevalent climatic conditions, snowfall is a common phenomenon, especially during the winter months from December to February, with the highest snowfall figures of 130mm (5.12") being registered in January.

A noteworthy feature of Arendal's climate is its relative humidity, which remains consistently high throughout the year. Figures range from 70% during the warmer months to as high as 86% in February. The average sunshine hours are markedly season-dependent, with the longest daylight periods in June amounting to 18.2 hours, declining substantially to a low of 6.5 hours in December.

The best time to visit Arendal

A desirable period for tourism in Arendal appears to coincide with the warmer months from May to August. During this time, the weather is mild and conducive for outdoor activities, with average temperatures ranging from 12.9°C (55.2°F) to 19.2°C (66.6°F). An added benefit lies in extended daylight hours, reaching up to 18.2 hours in June, promoting prolonged exploration opportunities.

The worst time to visit Arendal

Travel to Arendal might prove challenging during the colder months, particularly from December to February. During this period, average temperatures plunge to lows of -1.5°C (29.3°F), and the region experiences the highest snowfall, peaking at 130mm (5.12") in January. Additionally, daylight hours are markedly shorter, dropping to as low as 6.5 hours in December.

Spring weather in Arendal

Spring weather in Arendal witnesses a gradual increase in temperature with averages ranging from 4.1°C (39.4°F) in March to 12.9°C (55.2°F) by May. The amount of rainfall is initially high in March with 55mm (2.17") but then tapers off to 29mm (1.14") and 40mm (1.57") in April and May respectively. The city also enjoys increased daylight hours, varying from 11.9 hours in March to 16.8 hours at the end of spring in May.

Summer weather in Arendal

Arendal's summer kicks off in June with an average temperature of 17°C (62.6°F), peaking at 19.2°C (66.6°F) in July before subsiding slightly to 18.3°C (64.9°F) in August. Concurrently, levels of rainfall exhibit a steady rise, increasing from 53mm (2.09") in June to 61mm (2.4") by August. This period also corresponds with the maximum daylight time, averaging between 17.5 and 18.2 hours.

Autumn weather in Arendal

During autumn, Arendal experiences a downward trend in temperature, from an average high of 15.2°C (59.4°F) in September to 6.4°C (43.5°F) in November. Rainfall also escalates during this time, peaking at 88mm (3.46") in November. Overall, daylight hours start reducing from 12.8 hours in September to 7.9 hours by November.

Winter weather in Arendal

Characterised by low temperatures and high snowfall levels, winter in Arendal is quite harsh. The mean temperatures oscillate between 3.6°C (38.5°F) and -1.1°C (30°F). Snowfall is particularly prevalent in these months, peaking at 130mm (5.12") in January. The region also registers the shortest daylight hours of the year, ranging from just 6.5 to 7.2 hours from December to February.

Weather in January

The beginning of the year in Arendal, Norway, manifests as a winter wonderland. The chill in the air becomes profound as January marks the coldest month of the year with the lowest average temperature of -1.1°C (30°F). As a visitor to the city, prepare for frequent snowfall, as residents clear the winter white from their walkways. Weather in January »

Weather in February

The transition from January to February brings a slight reprive from the colder temperatures, but the weather remains firmly wintry. Snowfall continues albeit less frequent and intense than the previous month. Locals and visitors alike may enjoy the longer daylight hours compared to January. Weather in February »

Weather in March

March in Arendal signals the clear departure from winter's hibernation. A noticeable increase in average temperatures is experienced, reaching up to 4.1°C (39.4°F). As winter retreats, snowfall minimizes significantly while daylight slowly takes over. Weather in March »

Weather in April

April in Arendal is marked by the delightful arrival of spring. It brings a welcoming rise in temperature, melting the last remnants of winter's snow. The appreciable increase in daylight hours signals longer days and shorter nights. Weather in April »

Weather in May

The gradual transition into a warmer season continues into May in Arendal. In May, locals enjoy the most daylight hours, creating an extended day of activities. The weather becomes more suitable for outdoor pursuits due to the significantly warmer temperatures. Weather in May »

Weather in June

June marks the welcome arrival of summer in Arendal. The city experiences the warmest temperatures of the year, indicating the peak of the season. With an increased sea temperature, it is ideal for water-based activities. The perfect time for appreciating Arendal’s coast and ocean views. Weather in June »

Weather in July

Mid-summer rolls into Arendal with July, maintaining the summer high temperatures. The city experiences the year's highest sea temperatures, contributing to the prevalence of water activities. Long, sunny days and reduced relative humidity make for pleasant afternoons outdoors. Weather in July »

Weather in August

August in Arendal brings the last full month of summer, marked by steadily declining temperatures from peak July warmth. By mid-August, locals start preparing to wave summer goodbye. Though summer's end is near, the weather is still pleasantly warm and conducive to outdoor activities. Weather in August »

Weather in September

September signifies the arrival of fall in Arendal. Locals notice a drop in average temperatures to 15.2°C (59.4°F). As the leaves begin to change, the landscapes of the city display a riot of colors. With shorter days and longer nights, September ushers in the start of the harvest season. Weather in September »

Weather in October

As October arrives in Arendal, the city fully embraces the autumnal flushing of colors. The rain becomes more present compared to the drier summer months. Residents begin to brace for the chill that reinstates itself in the city's climate. Weather in October »

Weather in November

November in Arendal signifies the advent of winter. The city experiences its first snowfall since spring, covering arendal in a winter veil. The daylight dwindles substantially as the city plunges into longer wintery nights. Residents start preparing for the holiday season, with the cold weather making warm indoor festivities all the more appealing. Weather in November »

Weather in December

Arendal, in December, wraps into the depths of the winter season; with average temperatures dropping to 3.6°C (38.5°F). The city experiences the year's shortest daylight hours, something the residents have come to anticipate. Weather in December »

Frequently asked questions

How much does it rain in Arendal?

Throughout the year, in Arendal, Norway, there are 137.7 rainfall days, and 744mm (29.29") of precipitation is accumulated.

When does it snow in Arendal?

January through April, October through December are months with snowfall.

What is the snowiest month in Arendal?

January is the month with the most snowfall in Arendal. Snow falls for 8.8 days and accumulates 130mm (5.12") of snow.

How many days does it snow in Arendal?

Throughout the year, in Arendal, there are 32.5 snowfall days, and 408mm (16.06") of snow is accumulated.

What is the month with the least sunshine in Arendal?

January and December, with an average of 3.2h of sunshine, are months with the least sunshine in Arendal.

What is the month with the lowest UV index in Arendal?

With an average maximum UV index of 1, January is the month with the lowest UV index in Arendal, Norway.

What is the coldest month in Arendal?

The coldest temperatures occur during February, when averages reach a peak of 1.3°C (34.3°F) and a low of -1.5°C (29.3°F).

What is the most humid month in Arendal?

February is the most humid month in Arendal, with an average relative humidity of 86%.

What month is the sea coldest in Arendal?

The month with the coldest seawater is March, with an average sea temperature of 3.4°C (38.1°F).

What is the driest month in Arendal?

The month with the least rainfall is April, when the rain falls for 9.4 days and typically collects 29mm (1.14") of precipitation.

What are the least humid months in Arendal?

The months with the lowest humidity in Arendal, Norway, are May and June, with an average relative humidity of 70%.

When it does not snow in Arendal?

May through September are months without snowfall in Arendal.

When are the longest days in Arendal?

June has the longest days of the year in Arendal, Norway, with an average of 18h and 12min of daylight.

What month has the most sunshine in Arendal?

June has the most sunshine of the year in Arendal, Norway, with an average of 11.4h of sunshine.

What is the warmest month in Arendal?

July proves to be the warmest month, recording an average peak temperature of 19.2°C (66.6°F) and a minimum temperature of 13.6°C (56.5°F).

When is the highest UV index in Arendal?

The month with the highest UV index is July, with an average maximum UV index of 5.

When is the sea warmest in Arendal?

August is the month with the warmest seawater, with an average sea temperature of 18.2°C (64.8°F).

When is Daylight Saving Time (DST) in Arendal?

On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Arendal, Norway, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.

What is the rainiest month in Arendal?

The month with the most rainfall in Arendal, Norway, is November, when the rain falls for 15.5 days and typically aggregates up to 88mm (3.46") of precipitation.

What is the month with the shortest days in Arendal?

With an average of 6h and 30min of daylight, December has the shortest days of the year in Arendal.

Average temperature
Arendal, Norway

Average temperature - Arendal, Norway

The warmest month (with the highest average high temperature) is July (19.2°C).
The month with the lowest average high temperature is February (1.3°C).

The month with the highest average low temperature is July (13.6°C).
The coldest month (with the lowest average low temperature) is February (-1.5°C).

Average pressure
Arendal, Norway

Average pressure - Arendal, Norway

The month with the highest atmospheric pressure is April (1014.6mbar).
The month with the lowest atmospheric pressure is December (1007.8mbar).

Average wind speed
Arendal, Norway

Average wind speed - Arendal, Norway

The windiest month (with the highest average wind speed) is November (21.1km/h).
The calmest month (with the lowest average wind speed) is June (15.5km/h).

Average humidity
Arendal, Norway

Average humidity - Arendal, Norway

The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are May and June (70%).

Average rainfall
Arendal, Norway

Average rainfall - Arendal, Norway

The wettest month (with the highest rainfall) is November (88mm).
The driest month (with the least rainfall) is April (29mm).

Average rainfall days
Arendal, Norway

Average rainfall days - Arendal, Norway

The month with the highest number of rainy days is November (15.5 days).
The month with the least rainy days is February (8 days).

Average snowfall
Arendal, Norway

Average snowfall - Arendal, Norway

The month with the highest snowfall is January (130mm).
The months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days
Arendal, Norway

Average snowfall days - Arendal, Norway

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature
Arendal, Norway

Average sea temperature - Arendal, Norway

The best month for swimming (with the highest average sea temperature) is August (18.2°C).
The coldest month (with the lowest average sea temperature) is March (3.4°C).

Average daylight / Average sunshine
Arendal, Norway

Average daylight / Average sunshine - Arendal, Norway

The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).

The month with the most sunshine is June (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 12min).

Average sunshine days
Arendal, Norway

Average sunshine days - Arendal, Norway

The month with the most sunshine days is April (19 days).
The month with the least sunshine days is November (10.8 days).

Average visibility
Arendal, Norway

Average visibility - Arendal, Norway

The months with the highest visibility are April, May, June, July, August and September (10km).
The months with the lowest visibility are January, February, March, October, November and December (9km).

Arendal, Norway

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